I think I know your problem: it's about the area in front of the slanted wall? You would basically have to lay the pavement slanting against the wall. I would adjust the triangle in front later, so leave it out for now :)
maybe I somehow have a problem with my imagination right now.
Left area 3.60*2% = 7 cm below the door
Somewhere in between in the area of the bay window
Right area 2.60*2% = 5 cm below the door
In my head, the curb stones now run from right to left, descending? At least the stones in the area of the bay window. You have to catch the difference somewhere, right?
No, you will be closer to the door on the left side of the drawing (at 3.60) than on the right side, because you have to plan an additional meter of slope on the left. Or you have the same on both walls, then a bulge will form in the middle of the terrace, that is at the slanted wall.
Mea culpa. Ok, I think I should have mentioned that... there is a door in each of the three partition walls. So, on the house, I have to "start" from a height. With the same slope over different lengths, I then have different heights at the end, right?